Title :
Realization of Low Driving Voltage in Organic Light-Emitting Diodes Using C60 as an Electron Transport Layer and Alq3 as a Buffer Layer
Author :
Xiao Ming Wu ; Xue Mu ; Yu Lin Hua ; Juan Juan Bai ; Li Wang ; Zhi Hui Xiao ; Ni Dong ; Shou Gen Yin
Author_Institution :
Sch. of Mater. Sci. & Eng., Tianjin Univ. of Technol., Tianjin, China
Abstract :
Organic light-emitting diodes with low driving voltage based on fullerene (C60) as an electron transport layer and tris (8-hydroxyquinolinato)-aluminum (Alq3) as a buffer layer are successfully fabricated. For the optimal device with structures of ITO/NPB (40 nm)/Alq3 /(30 nm)/C60 (20 nm)/Alq3 (3 nm)/LiF (0.8 nm)/Al (120 nm), the turn-on driving voltage is 2.8 V, which is reduced 0.4 V compared with that of the control device. Meanwhile, the driving voltage of 4.9 V has been achieved at a luminance of 1000 cd/m2 in this device, which is reduced 1.8 V compared with that of the control device. The results have a significant effect on the commercialization application of the devices.
Keywords :
organic compounds; organic light emitting diodes; Alq3; C60; buffer layer; electron transport layer; fullerene; low driving voltage; organic light-emitting diode; tris (8-hydroxyquinolinato)-aluminum; ${rm C}_{60}$; low driving voltage; organic light-emitting diodes (OLEDs); ultrathin buffer layer;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2013.2251600
